Bending-machine.



PATENTEZD FEB. 14, 1905.

A.- G. SGHERER.

BBNDING MACHINE. APPLICATION mum FEB. 23, 1904.

UNITED STATES Patented February 14, 1905.

PATENT OFFICE.

ALBERT G. SOHERER, OF CHICAGO, ILLINOIS, ASSIGNOR TO ARTHUR W. GLESSNER, OF CHICAGO, ILLINOIS.

BENDlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 782,361, datedFebruary 14., 1905. Application filed February 23, 1904. Serial No. 194,814.

To all whom, it may concern:

Be it known that I, ALBERT G. SoHERER,a citizen of the United States, residing at Ohicago, in the county of (look and State of Illinois, have invented certain new and useful Improvements in Bending-Machines, of which the following is a specification. 7

My present inventionrelates to improvements in bending-machines, and has special reference to a machine by which crimped or looking edges are provided upon sheets of metal for the purpose of producing lockingseams primarily for any cylindrical sections such, for instance, as stovepipes; and the main object of my invention is therefore the provision of a simple mechanism by which this is accomplished, as disclosed herein.

In the accompanying drawings, Figure 1 is a front elevation of a complete machine made in accordance with my invention. Fig. 2 is a side elevation thereof. Fig. 3 is a vertical sectional view through the bending-rollers, showing in detail the means by which the edge of the sheet is secured to one of the rolls to produce the crimp or bend. Fig. 1 is a crosssectional view of a completed product, showing the bent ends formed by my machine.

Referring to the drawings, the numeral .1 designates the frame, which is provided with a bed-plate 2, upon which are mounted the supports 3 and 3, journaled in the lower part ofwhich is a shaft 4, carrying upon one end a drive-pulley 5 and near the other end a small pinion or cog 6, which is adapted to mesh with the large pinion or cog 7, which is mounted upon a shaft 8, journaled in the depending brackets 9, supported by the bedplate 2.

J ournaled in the upper portion of the supports 3 and 3 above the shaft 1 is a shaft 10, and adjustably journaled above this shaft in the same supports is a compression-roller 11, which is adjustably mounted by means of the set-screws 12, so as to be brought away from or in close proximity to the roller 13, carried by the shaft 10. Motion is imparted to these rollers through the medium of the disk 14, which is rotatably connected to the shaft 8 and has pivotally connected thereto, by means of the pin or shaft 15, the crank or pitman 16, which is pivotally mounted in'the bifurcated end 17 of the crank-arm 18, which is keyed at 19 to the shaft 10. By this construction it will be seen that the shaft 10, and consequently the roller'13, is given a partial revolution, and by means of the gears 20. and 21, carried, respectively, by the shaft 10 and theroller 11, motion is imparted, through the shaft 10, to the roller 11, the roller 11 being revolved in the opposite direction substantially the same distance as the roller 13.

As shown in Fig. 3 of the drawings, the lower roller 13 has a portion of its circumference flattened, as at 22, to which is secured, by means ofscrews, a plate 23, whose upper edge 24 is curved so as-to coincide-with the curvature of the roller, and secured to this plate 23 is a clamping-plate 25, which is adjustably held in place by means of the springs 26, which are connected to the pin 27, which hold the plate 25 in operable position to the plate 23. The plate 23 is provided with a recess 28 and with a shouldered portion 29, so as to receive the strip or projecting portion 30 and the lower edge 31 of the plate 25, the same lower edge 31 being slightly curved, so that a proper bearing will be afforded for the edge as the plate 25 is inclined to or from the plate 23. By this construction a space 32 is provided between the curved upper end 33 of the plate 25 and the upper portion of the plate 23, so thata strip or edge of the sheet of metal to be crimped or bent can be readily inserted within the space, sothat when the roller 13 is given a partial revolution the edge of the metal is bent and the same compressed between the plates 23 and 25 and also the body and bent edge compressed properly between the rollers 11 and 13. After the rollers have been given a partial revolution inward the crank and pitman and its disk return the rollers 11 and 13 in the opposite direction, and as the springs 26 give the plate 25 an outward tension the jaws thus formed by the plates 23 and 25 are separated, so that the crimped or bent edge of the metal sheet can be easily removed.

From the foregoing description the operation of my machine is readily understood, but briefly stated is as follows: The metal to be .crimped or bent has its edge first inserted in the space between the spring-controlled clamping-plates of the roller 13, and power is then applied through the medium of the pulley 5, so that the shaft 4 is revolved, revolving in turn the large pinion 7, which operates the disk 14, and consequently the pitman 16, so that the roller 13 is given an inward turn, operating at the same time the compressingroller 11, and after these rollers have been given a partial revoluti on the pitman is operated by means of the disk 14, which maintains a continuous rotation in one direction, so as to pull the crank-arm 18 in an opposite direction and return the crimped or bent sheet of metal finished, so that the same can be readily removed from between the clampingplates.

It is evident that I provide a machine which will bend or crimp the edges of sheet metal in a quick and thorough manner and at the same time provide a bend of even width and depth throughout the length, so that in producing edges of sheet-metal stovepipes the same will be uniformly made, so as to be readily interlocked to form the cylindrical sections.

What I claim as new, and desire to secure by Letters Patent, is

1. In a machine of this character, the combination of a pair of rollers, means for receiving the edge of a sheet of metal carried by one of the rollers, said means consisting of a plate secured to the lower roller having a recessed portion, and a clamping-plate opposed to said recess adapted to receive the edge of the sheet metal to be bent, and mechanism for imparting a fraction of a revolution to the rollers to provide the bend and returning the rollers after such operation.

2. In a machine of this character, the combination of a suitable framework, a pair of rollers mounted therein, means carried by one of said rollers for receiving one edge of a sheet of metal, said means consisting of a plate secured to the lower roller having a recessed portion, and a clamping-plate opposed to said recess adapted to receive the edge of the sheet metal to be bent, and mechanism mounted in the framework for oscillating said rollers to compress said edge to form a' bend or crimp and to return the completed product.

3. In a machine of this character, the combination of a suitable frame, a roller journaled in the upper portion thereof, another roller journaled below and adapted to transmit motion to said first-mentioned roller, a plate secured longitudinally upon said last-mentioned roller, a clamping-plate opposed to said plate adapted to be operated to receive and clamp an edge of a sheet of metal between said plates, a crank-arm carried by said last-mentioned roller, a pitman connected to said crankarm, a disk eccentrically connected to said pitman, and means adapted to operate said disk to impart to the crank-arm and its roller an oscillating movement.

4:. In a machine of this character, the combination with a suitable framework, of a pair of compressing-rollers one of said rollers being provided with a flattened surface, a stationary plate extending the length of said rollers and secured to the flattened surface thereof so that one edge terminatessubstantially in line with the periphery of the roller while the opposite end projects beyond to form a platform, a clamping-plate pivotally connected with the stationary plate adapted to form a jaw with the stationary plate for the reception of an edge of sheet metal, springs connected to the clamping-plate for holding the same in operable position with relation to said plate and mechanism for operating the rollers to compress the metal and the clamping-plate and to return the completed product.

In testimony whereof I aflix my signature in presence of two witnesses.

ALBERT G. SCHERER.

Witnesses:

WILLIAM F. ZI TELL, FRANK H. CULVER. 

